COMPATIBILITY AT POLYMER-POLYMER MIXTURE INTERFACES IN THE PRESENCE OF SOLVENT

We present some results obtained from theoretical study on a non-symme trical A/BC polymeric system including solvent which consists of two p hases, a polymeric phase A on one side and a mixture of polymers B (as a compatibilizer) and C on the other in the presence of a solvent. By employing the functional integral techniques we derive the mean-field equations and solve them numerically to deduce the physical propertie s of the interface involving the polymers and solvent concentration pr ofiles in the limit that molecular weights of all the polymers involve d tend to infinity. The calculations are performed for typical values of the Flory interaction parameters and for the volume fraction of pol ymer B in the asymptotic phase and of solvent. In the polymers/solvent blend under consideration the interfacial adsorption of polymer B, th e solvent concentration, and degrees of the specific interaction betwe en the polymers are found to play important roles in modification of t he interfacial properties.